Finding the Third Proportional to 123,428 and 269,433

Step by Step Solution

1. Step 1: Write the proportion equation
   123,428 : 269,433 = 269,433 : x
2. Step 2: Convert to fraction form
   123,428/269,433 = 269,433/x
3. Step 3: Cross multiply
   123,428x = 269,433 × 269,433
4. Step 4: Simplify right side
   123,428x = 72,594,141,489
5. Step 5: Solve for x
   x = 72,594,141,489/123,428
6. Step 6: Final answer
   x = 588,149.70